#app1{
    border: 1px solid gray;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
   
    
    
}
#app1 .output{
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid gray;
    width: 30vh;
    height: 10vh;
    font-size: 30px;
}
#app1 .actions > button{
    width: 50px;
    height: 50px;
    font-size: 20px;
}
#app1 .actions{
    display: flex;
    width: 30vh;
    justify-content: space-between;
    margin-top:5px ;

}